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#include "states.h"
// StateStack
StateStack::StateStack(State::Context context)
: pendingOps_()
, context_(context)
{
}
void StateStack::update(sf::Time dt){
for(State::Ptr &s: states_) {
s->update(dt);
}
}
void StateStack::render(){
for(State::Ptr &s: states_) {
s->render();
}
}
void StateStack::handleEvent(const sf::Event &event){
for(State::Ptr &s: states_) {
s->handleEvent(event);
}
}
void StateStack::requestOp(StateStack::Op op){
pendingOps_.push_back(op);
}
void StateStack::push(States::Id state){
states_.push_back(std::move(createState(state)));
}
void StateStack::pop(){
states_.pop_back();
}
void StateStack::clear(){
states_.clear();
}
void StateStack::applyPending(){
for(StateStack::Op &op: pendingOps_) {
switch(op.id){
case StateStack::OpId::Push:
push(op.state);
break;
case StateStack::OpId::Pop:
pop();
break;
case StateStack::OpId::Clear:
clear();
break;
}
}
pendingOps_.clear();
}
bool StateStack::isEmpty() const{
return states_.empty();
}
State::Ptr StateStack::createState(States::Id id){
return stateFactory_[id]();
}
// State
State::State(StateStack &stack, State::Context context)
: context_(context)
, stack_(&stack)
{}
void State::requestPush(States::Id state_id){
StateStack::Op op {StateStack::OpId::Push, state_id};
stack_->requestOp(op);
}
void State::requestPop(){
StateStack::Op op {StateStack::OpId::Push};
stack_->requestOp(op);
}
void State::requestClear(){
StateStack::Op op {StateStack::OpId::Clear};
stack_->requestOp(op);
}
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